/*   Copyright 2010 Jonathan Wagner
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
package com.alienos.collide.uniformgrid;

import com.alienos.collide.math.Vector3;

public final class UniformGridKey {

    private final int x;
    private final int y;
    private final int z;

    public UniformGridKey(int x, int y, int z) {
        this.x = x;
        this.y = y;
        this.z = z;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public int getZ() {
        return z;
    }

    public String toString() {
        return "UniformGridKey( x=" + x + ", y=" + y + ", z=" + z + ")";
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + x;
        result = prime * result + y;
        result = prime * result + z;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        UniformGridKey other = (UniformGridKey) obj;
        if (x != other.x)
            return false;
        if (y != other.y)
            return false;
        if (z != other.z)
            return false;
        return true;
    }

    public static UniformGridKey hash(Vector3 point, int gridSize) {
        float x = point.getX();
        float y = point.getY();
        float z = point.getZ();
        return new UniformGridKey((int) x / gridSize, (int) y / gridSize, (int) z / gridSize);
    }
}
